" The window slid upward. Fire woke in both of Magnus's palms, and magic blazed in the dark, sapphire-blue.
A figure pulled its torso through the window and then froze. Framed in the opening was a Shadowhunter in full demon-hunting gear, bow looped over one shoulder. He looked surprised.
"Uh, hi," said Alec Lightwood. "I'm home. Please don't shoot me with magical rays."
Magnus waved with both hands, blue lights paling, then winking out, leaving faint traces of smoke curling around his fingers. "You usually use the door."
"Sometimes I like the change of pace." Alec pulled himself the rest of the way in and closed the window behind him. Magnus gave him a look. "Okay. Truth. A demon ate my keys."
"We go through so many keys. "

― Cassandra Clare , The Lost Book of the White (The Eldest Curses, #2)